A high damping vibration reduction rubber composite material and its preparation method and application

Abstract

The present invention discloses a high damping vibration reduction rubber composite material, a preparation method and application thereof, and belongs to the technical field of rubber materials and their preparation. The purpose of the present invention is to ensure that the rubber composite material has excellent strength, compression permanent deformation and heat generation performance, and further improves the effective damping temperature range and room temperature damping performance of the rubber material. The raw materials of the rubber composite material provided by the present invention include butadiene-vinyl rubber, natural rubber, plasticizer, reinforcing filler, zinc oxide, stearic acid, sulfur, antioxidant and accelerator. The present invention introduces butadiene-vinyl rubber formed by coordination polymerization of an iron-based catalyst into a natural rubber material, and significantly improves the effective damping temperature range and room temperature damping performance of the rubber composite material under the condition that the composite material has excellent strength, compression permanent deformation and heat generation performance.

Description

Technical Field

[0001] The invention relates to a high-damping vibration-reducing rubber composite material and a preparation method and application thereof, belonging to the technical field of rubber materials and preparation thereof. Background Art

[0002] Damping materials can convert sound energy or mechanical vibration energy into heat energy and dissipate it. They are functional materials widely used in the fields of sound absorption and noise reduction of national defense equipment, vibration suppression and noise reduction in mechanical industry, vibration reduction and seismic isolation in bridge construction, etc.

[0003] Rubber materials have unique viscoelasticity and high loss capacity, and are an important base material for damping material products. For damping materials that solve the problem of "noise pollution", since the frequency range of sound is very wide (0.0001-10 12 Hz), according to the time-temperature equivalence principle, it is known that the rubber material needs to show obvious viscoelasticity in a wide temperature range. At the same time, for mechanical damping materials that reduce the harm caused by earthquakes, avoid and reduce mechanical vibration interference, and are used at room temperature, rubber materials need to show obvious viscoelasticity at room temperature. Therefore, high-damping vibration-reducing rubber materials should have high damping vibration-reducing performance under normal temperature and wide temperature range conditions. At the same time, in order to meet the requirements of high-performance high-damping vibration-reducing materials, they should also have the performance characteristics of high strength, high elasticity, low compression permanent deformation, and low heat generation. Taking rubber seismic isolation bearings as an example, high strength has a certain ability to resist earthquake damage. Rubber bearings are not easily damaged by rigidity during earthquakes. High elasticity and low compression permanent deformation can make the seismic isolation bearings better return to their original position after a certain deformation during an earthquake. Low compression heat generation can make the material have a longer life.

[0004] Unsaturated non-polar rubbers such as natural rubber are widely used in various vibration reduction products due to their excellent processing properties and high strength, high elasticity, low compression set and low heat generation. However, they have the problems of narrow effective damping temperature range (about 20-30°C) and low damping temperature range (about -50--10°C), which makes it difficult to meet the use requirements of national defense and industrial equipment with high damping vibration reduction performance under normal temperature and wide temperature range. Therefore, it is very necessary to provide a high damping vibration reduction rubber composite material and a preparation method thereof. Summary of the invention

[0005] The purpose of the present invention is to further improve the effective damping temperature range and room temperature damping performance of the rubber material while ensuring that the rubber composite material has excellent strength, compression permanent deformation and heat generation performance, so as to provide a high damping vibration reduction rubber material and a preparation method thereof for manufacturing damping vibration reduction materials.

[0006] The technical solution of the present invention:

[0007] One of the purposes of the present invention is to provide a high damping vibration reduction rubber composite material, which is composed of the following raw materials in parts by weight:

[0008] 30-70 parts of butyl rubber;

[0009] 30-70 parts of natural rubber;

[0010] Plasticizer 0-50 parts;

[0011] 20 to 70 parts of reinforcing filler;

[0012] 1-5 parts of zinc oxide;

[0013] 0.5-3 parts of stearic acid;

[0014] 0.5-3 parts of sulfur;

[0015] 0.5-3 parts of accelerator;

[0016] 1 to 5 parts of antioxidant;

[0017] Among them, the butylene-pentene rubber is prepared by coordination polymerization of monomer isoprene and monomer butadiene using an iron-based catalyst. During the preparation process, the molar ratio of monomer butadiene to isoprene is 1:(1-3), the molecular weight is 20-40w, the molecular weight distribution is 3-5, and the side group content is 40%-70%.

[0018] It is further defined that the pendant groups are vinyl and propenyl.

[0019] It is further defined that the Tg of butadiene-pentadiene rubber is -30°C to 0°C.

[0020] It is further defined that the butadiene-vinyl rubber is composed of 3,4-isoprene, 1,4-isoprene, 1,2-butadiene and 1,4-butadiene structural units.

[0021] It is further defined that the molar content of 3,4-isoprene is 60%-80%, the total molar content of cis-1,4-isoprene and trans-1,4-isoprene is 20%-40%; the molar content of 1,2-butadiene is 20%-40%, and the total molar content of cis-1,4-butadiene and trans-1,4-butadiene is 60%-80%.

[0022] It is further defined that the plasticizer is a mixture of one or more of naphthenic oil, aromatic oil, paraffin oil, TDAE, and vegetable oil.

[0023] It is further defined that the reinforcing filler is a mixture of one or more of carbon black, white carbon black, kaolin, talc, mica, montmorillonite, and carbon nanotubes.

[0024] It is further defined that the accelerator is a mixture of one or more of a sulfonamide vulcanization accelerator, a thiazole vulcanization accelerator, and a thiuram vulcanization accelerator.

[0025] It is further defined that the antioxidant is antioxidant 4020 and / or antioxidant RD.

[0026] The second object of the present invention is to provide a method for preparing a high damping vibration reduction rubber composite material, the method comprising the following steps:

[0027] Step 1, one-stage mixing: in an internal mixer, the filling factor is 0.6-0.8, natural rubber, butadiene-vinyl rubber, reinforcing filler, stearic acid and antioxidant are added for mixing, the mixing temperature is 135° C.-155° C., the mixing time is 120s-240s, and the mixing is completed to obtain a first-stage mixed rubber;

[0028] Step 2, two-stage mixing: putting the first-stage mixed rubber, zinc oxide and plasticizer into an internal mixer for mixing, the mixing temperature is 130° C. to 150° C., the mixing time is 180s to 240s, and the mixing is completed to obtain the second-stage mixed rubber;

[0029] Step 3, three-stage mixing: add the second-stage mixed rubber, sulfur and accelerator into an internal mixer, the mixing temperature is 90° C. to 110° C., the mixing time is 120 s to 180 s, and after the mixing is completed, a high damping vibration reduction rubber composite material is obtained.

[0030] A third object of the present invention is to provide an application of a high damping vibration reduction rubber composite material, wherein the rubber composite material is used to prepare a rubber seismic isolation bearing.

[0031] The present invention introduces high-performance butyl-pentane rubber into the rubber material, and significantly improves the effective damping temperature range and damping performance of the composite material under normal temperature conditions without affecting the strength, compression deformation and heat generation performance of the composite material. Compared with the prior art, it has the following significant effects:

[0032] (1) The present invention significantly improves the damping performance of the rubber composite material by introducing high-performance butyl-pentene rubber into the rubber composite material. This is mainly because the side group content of the butyl-pentene rubber is between 40% and 70%, which increases the loss modulus of the butyl-pentene rubber in dynamic strain and improves the damping performance of the butyl-pentene rubber. At the same time, the small volume and large number of side group structures can also reduce the degree of entanglement within the molecular chain and between the chains and increase the distance between the molecular chains, so that the reinforcing filler and the molecular chain have a higher contact area and interaction force, further improving the damping performance of the butyl-pentene rubber. At the same time, the molecular weight of the iron-based catalyzed butyl-pentene rubber is selected to be between 20w and 40w. This molecular weight can make the butyl-pentene rubber have a Mooney viscosity that is conducive to the dispersion of the reinforcing filler, which can effectively reduce the filler network effect of the vulcanized rubber, reduce the inclusion rubber content, and increase the volume of the effective rubber molecules that can move freely.

[0033] (2) The present invention reduces the compression heat generation and compression permanent deformation of the rubber composite material by introducing an iron-based catalytic butadiene-vinyl rubber molecular chain structure into the rubber composite material. This is mainly based on the weak electron-withdrawing side groups and low main chain double bond content of the butadiene-vinyl rubber, which reduce the crosslinking density and effectively improve the deformation capacity of the molecular chain segment; and the molar ratio of the monomers butadiene and isoprene for synthesizing butadiene-vinyl rubber is 1:1 to 1:3, and the molar content of 1,2-butadiene in the butadiene-vinyl rubber structural unit is 20% to 40%, and the molar content of 1,4-butadiene is 60% to 80%, wherein the butadiene segment is more flexible than the isoprene segment, and the vinyl side group also has a small volume compared to the propylene side group, so that the rubber composite material has a lower hysteresis heat generation effect.

[0034] (3) The present invention significantly improves the effective damping temperature range and room temperature damping performance of the rubber composite material by introducing the iron-based catalytic butyl-pentene rubber molecular chain structure into the rubber composite material. This is mainly because the molar ratio of the monomers butadiene and isoprene in the synthetic butyl-pentene rubber is 1:1 to 1:3, and the molar content of 1,2-butadiene in the butyl-pentene rubber structural unit is 20% to 40%, and the molar content of 1,4-butadiene is 60% to 80%. By introducing the butadiene structure with good flexibility, the number of side groups per unit volume of the butyl-pentene rubber is increased, and the damping temperature range of the butyl-pentene rubber is widened. At the same time, the molecular weight distribution of the butyl-pentene rubber is 3 to 5, which increases the number of chain ends that can move in the molecular chain, further widening the damping temperature range of the butyl-pentene rubber.

[0035] The molar content of 3,4-isoprene is 60% to 80%, and the molar content of 1,4-isoprene is 20% to 40%. The ability of the propylene group to restrict the movement of the chain segment is higher than that of the vinyl group, which is more conducive to the improvement of the damping performance and glass transition temperature of the butadiene-pentadiene rubber, so that the glass transition temperature of the butadiene-pentadiene rubber is between -30°C and 0°C. At the same time, the content of 1,4-isoprene of the present invention is designed to mainly make the range of 30 to 70 parts of butadiene-pentadiene rubber and 30 to 70 parts of natural rubber partially compatible rubber, and the blended rubber has two glass transition temperatures, and as the ratio of butadiene-pentadiene rubber to natural rubber approaches, the difference between the two glass transition temperatures gradually decreases. Therefore, by blending butadiene-pentadiene rubber and natural rubber, the effective damping temperature range and damping performance of the rubber composite material of the present invention are significantly improved. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0037] The experimental methods used in the following examples are conventional methods unless otherwise specified. The materials, reagents, methods and instruments used are conventional materials, reagents, methods and instruments in the art unless otherwise specified, and can be obtained through commercial channels by those skilled in the art.

[0038] The formulations and compositions of the rubber composite materials in all the embodiments of the present invention are listed in Table 1, and the main properties of the rubber composite materials are listed in Table 2.

[0039] Embodiment 1:

[0040] The formula of the high damping vibration reduction rubber composite material of this embodiment is shown in the data corresponding to Example 1 in Table 1;

[0041] The molecular weight of the butadiene rubber is 30.4w, and the molecular weight distribution is 3.2; the butadiene rubber is a butadiene rubber without gel; the butadiene rubber is prepared by coordination polymerization using an iron-based catalyst, and the molar ratio of monomers butadiene to isoprene is 1:2 during the preparation process; the butadiene rubber consists of an isoprene segment and a butadiene segment, wherein the isoprene segment consists of 3,4-isoprene and 1,4-isoprene; the butadiene segment consists of 1,2-butadiene and 1,4-butadiene; and the molar content of 1,2-butadiene in the butadiene structural unit of the butadiene rubber is 38%, and the total molar content of cis-1,4-butadiene and trans-1,4-butadiene is 62%; the molar content of 3,4-isoprene in the isoprene structural unit of the butadiene rubber is 64%, and the total molar content of cis-1,4-isoprene and trans-1,4-isoprene is 36%.

[0042] The method for preparing the high damping vibration-damping rubber composite material of Example 1 is carried out by the following steps:

[0043] Step 1, first stage mixing: in an internal mixer, the filling factor is 0.72, natural rubber, butadiene-vinyl rubber, reinforcing filler, stearic acid, and antioxidant are added for mixing, the mixing temperature is 140° C., the mixing time is 180 s, and the mixing is completed to obtain a first stage mixed rubber;

[0044] Step 2, two-stage mixing: the first-stage mixed rubber, zinc oxide and plasticizer are put into an internal mixer for mixing at a mixing temperature of 130° C. for a mixing time of 210 s, and after mixing, a second-stage mixed rubber is obtained;

[0045] Step 3, three-stage mixing: add the second-stage mixed rubber, sulfur and accelerator into an internal mixer, the mixing temperature is 100° C., the mixing time is 120 s, and the mixing is completed to obtain a high damping vibration reduction rubber composite material.

[0046] Embodiment 2:

[0047] The formula of the high damping vibration reduction rubber composite material of this embodiment is shown in the data corresponding to Example 2 in Table 1;

[0048] The molecular weight of the butadiene rubber is 34.2w, and the molecular weight distribution is 3.5; the butadiene rubber is a butadiene rubber without gel; the butadiene rubber is prepared by coordination polymerization using an iron-based catalyst, and the molar ratio of monomers butadiene to isoprene is 1:1 during the preparation process; the butadiene rubber consists of an isoprene segment and a butadiene segment, wherein the isoprene segment consists of 3,4-isoprene and 1,4-isoprene; the butadiene segment consists of 1,2-butadiene and 1,4-butadiene; and the molar content of 1,2-butadiene in the butadiene structural unit of the butadiene rubber is 30%, and the total molar content of cis-1,4-butadiene and trans-1,4-butadiene is 70%; the molar content of 3,4-isoprene in the isoprene structural unit of the butadiene rubber is 72%, and the total molar content of cis-1,4-isoprene and trans-1,4-isoprene is 28%.

[0049] The method for preparing the high damping vibration-damping rubber composite material of Example 2 is carried out by the following steps:

[0050] Step 1, one-stage mixing: in an internal mixer, the filling factor is 0.68, natural rubber, butadiene-vinyl rubber, reinforcing filler, stearic acid, and antioxidant are added for mixing, the mixing temperature is 140° C., the mixing time is 120 s, and the mixing is completed to obtain a first-stage mixed rubber;

[0051] Step 2, two-stage mixing: the first-stage mixed rubber, zinc oxide and plasticizer are put into an internal mixer for mixing at a mixing temperature of 130° C. for a mixing time of 240 seconds, and the two-stage mixed rubber is obtained after the mixing is completed;

[0052] Step 3, three-stage mixing: add the second-stage mixed rubber, sulfur and accelerator into an internal mixer, the mixing temperature is 100° C., the mixing time is 150 s, and the mixing is completed to obtain a high damping vibration reduction rubber composite material.

[0053] Embodiment 3:

[0054] The formula of the high damping vibration reduction rubber composite material of this embodiment is shown in the data corresponding to Example 3 in Table 1;

[0055] The molecular weight of the butadiene rubber is 28.7w, and the molecular weight distribution is 3.6; the butadiene rubber is a butadiene rubber without gel; the butadiene rubber is prepared by coordination polymerization using an iron-based catalyst, and the molar ratio of monomers butadiene to isoprene is 1:1.5 during the preparation process; the butadiene rubber consists of an isoprene segment and a butadiene segment, wherein the isoprene segment consists of 3,4-isoprene and 1,4-isoprene; the butadiene segment consists of 1,2-butadiene and 1,4-butadiene; and the molar content of 1,2-butadiene in the butadiene structural unit of the butadiene rubber is 32%, and the total molar content of cis-1,4-butadiene and trans-1,4-butadiene is 68%; the molar content of 3,4-isoprene in the isoprene structural unit of the butadiene rubber is 74%, and the total molar content of cis-1,4-isoprene and trans-1,4-isoprene is 26%.

[0056] The method for preparing the high damping vibration-damping rubber composite material of Example 3 is carried out by the following steps:

[0057] Step 1, first stage mixing: in an internal mixer, the filling factor is 0.75, natural rubber, butadiene-vinyl rubber, reinforcing filler, stearic acid, and antioxidant are added for mixing, the mixing temperature is 145° C., the mixing time is 120 s, and the mixing is completed to obtain a first stage mixed rubber;

[0058] Step 2, two-stage mixing: the first-stage mixed rubber, zinc oxide and plasticizer are put into an internal mixer for mixing at a mixing temperature of 135° C. for 200 seconds to obtain a second-stage mixed rubber;

[0059] Step 3, three-stage mixing: add the second-stage mixed rubber, sulfur and accelerator into an internal mixer, the mixing temperature is 110° C., the mixing time is 120 s, and the high damping vibration reduction rubber composite material is obtained after the mixing is completed.

[0060] Embodiment 4:

[0061] The formula of the high damping vibration reduction rubber composite material of this embodiment is shown in the data corresponding to Example 4 in Table 1;

[0062] The molecular weight of the butadiene rubber is 36.5w, and the molecular weight distribution is 3.0; the butadiene rubber is a butadiene rubber without gel; the butadiene rubber is prepared by coordination polymerization using an iron-based catalyst, and the molar ratio of monomers butadiene to isoprene is 1:1 during the preparation process; the butadiene rubber consists of an isoprene segment and a butadiene segment, wherein the isoprene segment consists of 3,4-isoprene and 1,4-isoprene; the butadiene segment consists of 1,2-butadiene and 1,4-butadiene; and the molar content of 1,2-butadiene in the butadiene structural unit of the butadiene rubber is 24%, and the total molar content of cis-1,4-butadiene and trans-1,4-butadiene is 76%; the molar content of 3,4-isoprene in the isoprene structural unit of the butadiene rubber is 70%, and the total molar content of cis-1,4-isoprene and trans-1,4-isoprene is 30%.

[0063] The method for preparing the high damping vibration-damping rubber composite material of Example 4 is carried out by the following steps:

[0064] Step 1, first stage mixing: in an internal mixer, the filling factor is 0.75, natural rubber, butadiene-vinyl rubber, reinforcing filler, stearic acid, and antioxidant are added for mixing, the mixing temperature is 145° C., the mixing time is 120 s, and the mixing is completed to obtain a first stage mixed rubber;

[0065] Step 2, two-stage mixing: the first-stage mixed rubber, zinc oxide and plasticizer are put into an internal mixer for mixing at a mixing temperature of 135° C. for 200 seconds to obtain a second-stage mixed rubber;

[0066] Step 3, three-stage mixing: add the second-stage mixed rubber, sulfur and accelerator into an internal mixer, the mixing temperature is 110° C., the mixing time is 120 s, and the high damping vibration reduction rubber composite material is obtained after the mixing is completed.

[0067] Comparative Example 1:

[0068] The formula of the rubber composite material of this comparative example is shown in the data corresponding to comparative example 1 in Table 1; the types of raw materials are the same as those in Example 1.

[0069] The method for preparing the high damping vibration reduction rubber composite material of Comparative Example 1 is carried out according to the following steps:

[0070] Step 1, first stage mixing: in an internal mixer, the filling factor is 0.68, natural rubber, reinforcing filler, stearic acid, and antioxidant are added for mixing, the mixing temperature is 140° C., the mixing time is 120 s, and the mixing is completed to obtain a first stage mixed rubber;

[0071] Step 2, two-stage mixing: the first-stage mixed rubber, zinc oxide and plasticizer are put into an internal mixer for mixing at a mixing temperature of 130° C. for a mixing time of 240 seconds, and the two-stage mixed rubber is obtained after the mixing is completed;

[0072] Step 3, three-stage mixing: add the second-stage mixed rubber, sulfur and accelerator into an internal mixer, the mixing temperature is 100° C., the mixing time is 150 s, and the mixing is completed to obtain a high damping vibration reduction rubber composite material.

[0073] Comparative Example 2:

[0074] The formula of the rubber composite material of this comparative example is shown in the data corresponding to comparative example 2 in Table 1; the types of raw materials are the same as those of Example 3.

[0075] The method for preparing the high damping vibration reduction rubber composite material of Comparative Example 2 is carried out according to the following steps:

[0076] Step 1, first stage mixing: in an internal mixer, the filling factor is 0.68, natural rubber, reinforcing filler, stearic acid, and antioxidant are added for mixing, the mixing temperature is 140° C., the mixing time is 120 s, and the mixing is completed to obtain a first stage mixed rubber;

[0077] Step 2, two-stage mixing: the first-stage mixed rubber, zinc oxide and plasticizer are put into an internal mixer for mixing at a mixing temperature of 130° C. for a mixing time of 240 seconds, and the two-stage mixed rubber is obtained after the mixing is completed;

[0078] Step 3, three-stage mixing: add the second-stage mixed rubber, sulfur and accelerator into an internal mixer, the mixing temperature is 100° C., the mixing time is 150 s, and the mixing is completed to obtain a high damping vibration reduction rubber composite material.

[0079] Comparative Example 3:

[0080] The formula of the rubber composite material of this comparative example is shown in the data corresponding to comparative example 3 in Table 1;

[0081] The molecular weight of the butadiene rubber is 34.1w, and the molecular weight distribution is 3.6; the butadiene rubber is a butadiene rubber without gel; the butadiene rubber is prepared by coordination polymerization using an iron-based catalyst, and the molar ratio of monomers butadiene to isoprene is 1:1 during the preparation process; the butadiene rubber consists of an isoprene segment and a butadiene segment, wherein the isoprene segment consists of 3,4-isoprene and 1,4-isoprene; the butadiene segment consists of 1,2-butadiene and 1,4-butadiene; and the molar content of 1,2-butadiene in the butadiene structural unit of the butadiene rubber is 56%, and the total molar content of cis-1,4-butadiene and trans-1,4-butadiene is 46%; the molar content of 3,4-isoprene in the isoprene structural unit of the butadiene rubber is 70%, and the total molar content of cis-1,4-isoprene and trans-1,4-isoprene is 30%.

[0082] The method for preparing the high damping vibration reduction rubber composite material of Comparative Example 3 is carried out according to the following steps:

[0083] Step 1, first stage mixing: in an internal mixer, the filling factor is 0.75, natural rubber, butadiene-vinyl rubber, reinforcing filler, stearic acid, and antioxidant are added for mixing, the mixing temperature is 145° C., the mixing time is 120 s, and the mixing is completed to obtain a first stage mixed rubber;

[0084] Step 2, two-stage mixing: the first-stage mixed rubber, zinc oxide and plasticizer are put into an internal mixer for mixing at a mixing temperature of 135° C. for 200 seconds to obtain a second-stage mixed rubber;

[0085] Step 3, three-stage mixing: add the second-stage mixed rubber, sulfur and accelerator into an internal mixer, the mixing temperature is 110° C., the mixing time is 120 s, and the high damping vibration reduction rubber composite material is obtained after the mixing is completed.

[0086] Table 1 Composition of rubber composite materials

[0087] Components Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Comparative Example 3 NBR 70 50 30 0.0 20 30 Natural rubber 30 50 70 100 80 70 Naphthenic Oil 10 10 10 10 10 10 Carbon Black 50 50 50 50 50 50 Zinc Oxide 3.0 3.0 3.0 3.0 3.0 3.0 Stearic acid 2.0 2.0 2.0 2.0 2.0 2.0 Antioxidant 4020 2.0 2.0 2.0 2.0 2.0 2.0 Antioxidant RD 1.0 1.0 1.0 1.0 1.0 1.0 sulfur 2 2 2 2 2 2 Accelerator CZ 1.5 1.5 1.5 1.5 1.5 1.5

[0088] Table 2 Main properties of rubber composite materials

[0089]

[0090] The damping temperature range in the table is DMA test, the test conditions are 10HZ, heating rate 5℃ / min, dynamic strain 0.25%

[0091] As can be seen from Table 2, through the comparative analysis of Examples 1-3 and Comparative Example 1, it can be seen that the iron-based catalyzed butyl-pentadiene rubber and natural rubber designed by the present invention have partial compatibility, and on the basis of improving the mechanical properties of natural rubber, thermal oxidation aging performance and reducing compression heat generation, the effective damping temperature range and damping performance of the rubber composite material are improved. Through the comparative analysis of Examples 1-4 and Comparative Example 2, it can be seen that under the conditions of 80 parts of natural rubber and 20 parts of butyl-pentadiene rubber, the compatibility of natural rubber and butyl-pentadiene rubber is improved. Through DMA testing, the rubber composite material has a glass transition temperature, and the improvement of the effective damping temperature range and room temperature damping performance is limited. Through the comparative analysis of Example 3 and Comparative Example 3, it can be seen that reducing the molar content of 1,4-butadiene in butyl-pentadiene rubber narrows the limited damping temperature range of the rubber composite material.

[0092] Although the present invention has been disclosed as above in the preferred embodiment, it is not intended to limit the present invention. Anyone familiar with this technology can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be based on the definition of the claims.

Claims

1. A high damping vibration reduction rubber composite material, characterized in that: It is composed of the following raw materials in parts by weight: 30-70 parts of butadiene-pentadiene rubber; 30-70 parts of natural rubber; Plasticizer 0-50 parts; 20 to 70 parts of reinforcing filler; 1-5 parts of zinc oxide; 0.5-3 parts of stearic acid; 0.5-3 parts of sulfur; 0.5-3 parts of accelerator; 1 to 5 parts of antioxidant; Among them, the butylene-pentene rubber is prepared by coordination polymerization of isoprene monomers and butadiene monomers using an iron-based catalyst. During the preparation process, the molar ratio of butadiene monomers to isoprene is 1:(1-3), the molecular weight is 20-40w, the molecular weight distribution is 3-5, and the side group content is 40%-70%; Butadiene-vinyl rubber is composed of 3,4-isoprene, 1,4-isoprene, 1,2-butadiene and 1,4-butadiene structural units; The total molar content of cis-1,4-butadiene and trans-1,4-butadiene is 60% to 80%.

2. The high damping vibration reduction rubber composite material according to claim 1, characterized in that: The Tg of butadiene-pentadiene rubber is -30℃~0℃; the side groups are vinyl and propylene.

3. The high damping vibration-absorbing rubber composite material according to claim 2, characterized in that: The molar content of 3,4-isoprene is 60% to 80%, the total molar content of cis-1,4-isoprene and trans-1,4-isoprene is 20% to 40%; and the molar content of 1,2-butadiene is 20% to 40%.

4. The high damping vibration reduction rubber composite material according to claim 1, characterized in that: The plasticizer is a mixture of one or more of naphthenic oil, aromatic oil, paraffin oil, TDAE and vegetable oil.

5. The high damping vibration reduction rubber composite material according to claim 1, characterized in that: The reinforcing filler is a mixture of one or more of carbon black, white carbon black, kaolin, talcum powder, mica, montmorillonite and carbon nanotubes.

6. The high damping vibration reduction rubber composite material according to claim 1, characterized in that: The antioxidant is antioxidant 4020 and / or antioxidant RD.

7. The high damping vibration reduction rubber composite material according to claim 1, characterized in that: The accelerator is a mixture of one or more of sulfonamide vulcanization accelerators, thiazole vulcanization accelerators and thiuram vulcanization accelerators.

8. A method for preparing the high damping vibration-reducing rubber composite material according to claim 1, characterized in that: The preparation is carried out by mixing in stages.

9. An application of the high damping vibration reduction rubber composite material according to claim 1, characterized in that: Used to prepare rubber seismic isolation bearings.

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